You can enter a number in a text field, but it will be treated as text. That is why 15 is less than 7; just like AB is less than F if sorted alphabetically. The best solution is to use a numeric input field. This way you may use all the arithmetic functions in a conventional manner.
Hi, I have a Text Input Item,with format None, in my form and user enters a number in it.For Example 1,2,3–15. Now I want to create a Report where I want to Filter that Text Input Item with condition (Less then <) 7. But problem is in report im also getting values like 10,11,12,13,14,15 whereas it should be only from 1 to 6 as I set condition Less then 7.